Patent · US Expired

Method for retrieving data from first and second storage medium

US7640228B2 · kind B2 · utility

7Cited by

3References

11Claims

0Family size

Assignee

Thomson Licensing · FR

Inventors

Jobst Hörentrup · Hannover, DE
Dirk Gandolph · Hannover, DE
Axel Kochale · Springe, DE
Ralf Ostermann · Hannover, DE
Carsten Herpel · Bad Driburg, DE

Key dates

Filing date	Aug 23, 2004
Grant date	Dec 29, 2009
Priority date	—
Expiry date	Jun 11, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S707/99932
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for modifying data read from read-only media during playback time comprises logically merging the on-disc directory tree and an associated off-disc directory tree. A logical directory tree is constructed from the data retrieved from the read-only medium, wherein the structure of the logical directory tree is identical with the structure of the directory tree of the medium. The method allows replacing content on the disc through downloaded content, e.g. replacing an out-dated trailer stored on the disc through a downloaded trailer for a new movie. The method further allows complementing or upgrading content on the disc, e.g. by downloading a new subtitle track from the internet.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.